Rim tool



W. H. BUTTRAM.

RIM TOOL.

APPLICATION FILED IUNE'B, 1921.

1 420 13. Patented June 2 7, 1922.

aki'oz new WILLIAM HUMIPI-IREY BUTTRAM, OF. SALLISAVT, OKLAHOMA,ASSIGNOR 013 ONE- I-IALF TO B. KOBEL, ONE-FOUBTH TO W. D. MAYO, ANDONE-FOURTH TO 3. M.

MAYO, ALL OF SAIZ-LISAW, OKLAHOMA.

RIM TOOL.

Specificationof Letters Patent. Patented June 2'7, 1922,

Application filed June 8, 1921. Serial No. 475,940;

T 0 all whom it may concern:

Be it known that I, WILLIAM HUMP REY BUTTRAM, a citizen of the UnitedStates, re siding at Sallisaw, in the county of Sequoyah and State ofOklahoma, have in vented certain new and useful Improvements in a RimTool, of which the following is a specification.

My invention relates to automobile appliances and in particular to atool adapted to be used for the contraction and expansion of demountablerims.

The particular object of the invention is to provide a tool of thischaracter which may be readily applied or detached from a rim, and onewhich is designed to be applied to any size of rim, in such a mannerthat the rim may be expanded or contracted with the minimum amount ofenergy on the part of the operator.

A further object of the invention is to provide a tool of this characterwhich is selfcentering within the rim, and which is positive in itsaction relative to the engagement of the rim.

With these and such other objects in view as will be apparent from thedescrip tion, my invention resides in the novel construction,combination and arrangement of parts hereinafter described and .claimed,and taken in connection with the accompanying drawings, in which Figure1 is an elevation illustrating the tool as applied to a rim;

Figure 2, a vertical section through the rim and tool as applied;

Figure 3, a detailed elevation of a modified element of the tool; and

Figure 4, a detailed perspective of an element employed.

Figure 1 illustrates the preferred embodiment of my invention as appliedto a rim 1 carrying the usual tire 2. In detail, the tool comprises thescrew threaded shaft 3 having an eye 4 atom end in which is positionedan operating lever 5. Cross blocks 6 are provided to engage over theshaft 3 at opposite ends thereof, being pro vided with central aperturesinternally screw-threaded to engage the shaft. These blocks are two innumber and the outer ends of the cross arms are bifurcated to receivetherein rods 7 and 8, pivoted between the bifurcations by means of pivotpins 9 and 10.

The arms 7 are arranged in pairs extending from opposite sides of theblocks 6, and

are pivoted at their outer ends between the pairs of U-shaped metalcastings 11, which castings are held connected by means of the pivot pin12 of the arms. The castings 11 are of such dimensions as to extend,when applied to a rim, upwardly along the sides of the rim, as bestillustrated in Figure 2. The ends of the castings are provided with aseries of aligned perforations 18 in which pivot studs 14:, carried byhook members 15, are adapted to be adjustably engaged, whereby the hookmembers are pivoted in the castings in such manner as to be engagedbetween the rim and the tire, as illustrated in Figure 2.

Each pair of arms 8 is pivoted at the outer ends of the arms in asimilar manner, to. substantially rectangular castings 16 adapted tobear against the inner surface of the rim when the tool is applied. Thedisposition of the cross blocks, arms and castings is such that when thetool is applied to the rim the shaft 3 will be centrally positionedwithin the interior of the rim, and upon operation of the lever 5 theblocks 6 may be drawn towards or away from each other to contract orexpand the respective pairs of arms 7 and 8. As illustrated in Figure 2,the opposite ends of shaft 3 are reversely threaded for an obviouspurpose, but if desired only one end of the shaft may be threaded,namely, the outer end, and the inner block 6 may be held in position onthe shaft by means of collars 17 arranged at opposite sides thereof, asillustrated in Figure 3.

In operation, the tool is placed within a rim and the handle 5 turned todraw the blocks 6 toward each other a sufficient distance to bring thecastings 16 and 11 into engagement with the interior of the rim,whereupon hooks 15 are engaged over the rim as described, and uponmanipulation of the lever 5 in the proper direction the blocks 6 aremoved away from each other, contracting the arms 7 and 8 and drawing therim sections inwardly, as illustrated in Figure 1. In order to expandthe rim, it is simply necessary to reverse the direction of movement ofthe lever 5, in which instance the castings or lugs will expand againstthe rim and force the same outwardly into its proper engagement.

opposite ends of each adjacent pair of arms termininating in spacedrelation, arcuate castings pivotally connecting the free ends of eachadjacent pair of arms that are dis posed in alinement, rim engaginghooks ad justably mounted in the ends of said cast ings, and rectangularshaped rim abutting heads pivotally connecting the free ends of theremaining adjacent pairs of arms that are alined.

In testimony whereof I mix my signature.

lVILLIAM HUMPHREY BUTTRAM.

